Wire screen



,IM/Wow ZM/Mf/PMMJS E. P. DOUGLASS WIRE SCREEN Filed April 28, 1937 March 14, 1939.

Patented Mar. '14, 1939 i UNITED STATES PATENT OFFICE WIRE SCREEN l 'Eldridge P. Douglass, Fayetteville, Ark.

Application April 28, 1937, Serial No. 139,372 2 claims. (c1. liss- 425) 1n ing wire screen, with modifications which are possible without entirely redesigning such machinery.

In the manufacture of screen wire at the pressent time continuous longitudinal or warp wires 1| of sufficient number to form, at a chosen spacing,'the desired width of screen are crossed and interwoven with Woof wires, usually at the same spacing, these woof wires being substantially at right angles to the warp Wires, the screen being a) made by machinery somewhat similar to thatused in making cloth. 'Ihe Wire screen so made' is in a continuous strip'which is wound into a roll from which such lengths as are desired are cut for use. A length lso cut is secured by nail- 25 ing, clamping, or otherwise, along its edges to a frame which surrounds it. Obviously these frames may be of any shape but in the great majority of cases they are rectangular, and in the interest. of economy the warp and Woof wires 30 of the screen are parallel to the side and end members of the frame. A Wire screen so placed obviously affords no resistance to the frame to prevent distortion from rectangular shape. It

immediately appears obvious that the wire screen 35 might be so shifted that the wires would lie diag- 4onally with respectV to the sides and ends vof the frame and would accomplish the bracing of such frame, which is much to be desired, but the obvious waste in using screen-wire in this manner o is so great that it is substantially never resorted to. Applicant, therefore, attempted to resort to V,what may have been an obvious mechanical eX- pedient, that is, weaving a wire screen with diagonal Woof and warp wires, the result of 45 which, had it been obtained, would obviously have been desirable, but such `insurroundable difficulties were met, that it was apparently necessary to abandon the idea.

Applicant; has, however, discovered that even 50 though the warp wires lie in lines parallel to the sides, that if the woof wires are placed at au angle other than a right angle, bracing against distortion will be had, such bracing of course increasing in extent and value as the angularlty of.

grees to the warp wires. It is obvious that where a wire screen of such nature is fastened to a rectangular frame that any distortion which tends to lengthen the woof wires would be resisted, and such bracing is satisfactory where 5 sag, as of the edges of a door away from the hinged side, is concerned; but it is not so obviousthat the stiifening would be accomplished in the opposite direction. It is found, however, by tests that such stiiening does-occur provided the wire screen is properly at and taut after securing to the frame. Applicant believes that the action set up is that the w'arp wires so confine the wool wires against lateral displacement at each point of crossing ofthe wires that, slender as the Woof wires are, they are thus made suiiiciently short relative to their size as to act in cuompression to resist the distortion. Be that as it may, the result is a stifening against compression of the rectangular frame along either of its diagonal axes, a result desirable as in window screens.

Applicant has further found that it is possible to weave a wire screen of the above nature in panying drawing, in which- Fig. 1 is a face view of a strip of screen-wire l.Woven in accordance with my invention;

Fig, 2 a similar view showing increased angularity of the transverse wires; and

Fig. 3 is a face view of a screen door making 40 use of screen-wire woven in accordance with the showing of Fig. 1.

Referring now to the drawing, in which the various parts are indicated by numerals, lll are the warp wires spaced uniformly apart and lying parallel to the sides of the strip, and Il the woof wires disposed at an angle other than a right angle, transversely across the strip, these wires preferably being uniformly spaced and preferably also at the same spacing as the warp wires. As shown in Fig. 1 the Woof Wires make an angle of about 7% degrees away from a true ninety degrees to the Warp wires, this angle being believed to represent substantially a minimumanglewhich these wires may have and yet be angle than there shown is preferable, such an angle being shown in Fig. 2.

In Fig. 3 a typical screen door is shown, I5 I being the side frames, I6 and I1 top and bottom frames and I8 an intermediate cross frame. I9 are hinges and 20 a handle. 2| and 22 are respectively the warp and Woof wires. The wire screens form web portions enclosed by the frame members I5, I6 and I8 and the frame members I5, I'l and I8 respectively. The peripheral edges of the webs are covered as by strirm 23, which 'strips may cooperate with the frame members to secure the webs, or may serve to 'cover the web edges after they have been secured by any of the methods such as are usually employed or may be found desirable for such purposes.

I claim: v

1. A line mesh screen woven from thread like y $3,150,647 effective. It is believed, however, that a greater wire, the warp strands extending continuously along lines parallel to the length of said screen, and the Woof wires extending continuously along lines which are parallel and deviate a substantial amount from a ninety/degree angle with said Woof wire-, the warp an/d Woof wires being interwoven but otherwise 'not deviating from substantially straight lines.

2. A ne mesh screen woven from threadl like Wire, the Warp strands extending continuously along lines parallel to the length of said screen and the Woof Wires extending continuously along lines which are parallel and deviate in excess of ve degrees from a ninety degree angle with said warp wires, the warp and Woof Wires being interwoven, but otherwise not deviating vfrom substantially straight lines.

ELDRIDGE P. DOUGLASS. 

